What should a lifeguard do upon witnessing an incident or injury?

Upon witnessing an incident or injury, the appropriate action for a lifeguard is to activate emergency services and provide care. This response is critical because the lifeguard is trained to prioritize the safety and well-being of individuals in distress. Activating emergency services, such as calling 911, ensures that professional medical assistance is on the way while the lifeguard can begin to administer first aid or CPR as needed. This prompt response can significantly improve the chances of a positive outcome for the victim.

Providing care immediately is vital, as delays could worsen the victim’s condition. The lifeguard's training equips them to assess the situation quickly and respond accordingly, whether it involves assisting someone who is injured, performing rescue techniques, or managing a crowd to prevent further incidents.

The other choices do not support the immediate needs of the situation. Leaving the area would leave the victim without assistance, waiting for another lifeguard might create unnecessary delays, and informing the victims' family, while important, does not address the immediate needs for medical help and care. Therefore, activating emergency services and providing care are the critical first steps a lifeguard should take in such scenarios.